NEET UG CHEMISTRY MCQ: STATES OF MATTER

1 Easy

1 of 1

Application +4 | -1

Assuming that air is

79 \%

by mole of

\mathrm{N}_2, 20

mole

\% \mathrm{O}_2

and

1 \% \mathrm{Ar}

, the density of air at

25^{\circ} \mathrm{C}

and

1 \mathrm{~atm}

View answer and explanation

Correct option: A

1.18 \mathrm{~g} / \mathrm{lit}

Option A (

1.18 \mathrm{~g} / \mathrm{lit}

) is correct because it uses the ideal gas law with the average molar mass of air calculated from the given composition.

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\begin{array}{cccccccccccccccccccc} {\underline {{\text{Gas}}} }&{\underline {\,{\text{Critical}}\,\,{\text{temperature}}} } \\ {\text{A}}&{{T_{{C_1}}}} \\ {\text{B}}&{{T_{{C_2}}}} \\ {\text{C}}&{{T_{{C_3}}}} \\ {\text{D}}&{{T_{{C_4}}}} \end{array}

{T_{{C_1}}} > {T_{{C_2}}} > {T_{{C_3}}} > {T_{{C_4}}}

{r^x}

r

x